Aeroplane propeller



Feb; 5, 1924., v 1,482,69Q

. e. LANZIUS "AEROPLANE PROPELLEH Filed Feb. 10. 1919 2 Sheets-Sheet 1 k 5 INVENTOR 3 7 6eorye ZaflZ/Z/s ATTORNEY Feb, 5 1924.

. v Ma ma G. LANZEUS AEROPLANE PRQPELLER Filed Feb. 10 1919 2 Sheats-Sheet 2 INVENTOR Geo/ye lanzl'us BY Maw W ATT0R?\l Y v Patented 5, a i

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GEbEGE LANZIUS, OF NEW YORK, N. YJ EVEJLYN ELIETH FAIRBANKS LANZIWS j EXECUTBIX OF SAID GEORGE LANZIUS, DECEASW.

AEEOPLANE PBOPELLEE.

Application filed February 10, 1919. Serial No. 275,959.

specification.

tion, combination, and arrangement of vation;

looking in the direction indicated This invention relates to aeroplane propellers.v V a The object of the invention is toprovide aconstruction in which the centrifugal force ofthe blades of a propeller is balanced by the pull of one blade against the other.

A further object of the invention is to provide an eificient means for varying the angle of the blades in'proportion to the speed of the propeller shaft. A further object is to provide a construction which iseasily assembled and taken down.

The invention consists of the construcparts, as herein illustrated, described and claimed. In the accompanying drawings, forming part hereof, is illustrated a form of em? bodiinent of the invention, in which draw-' ings /siinilar reference characters designate corresponding parts, and in which:

Figure 1 is an end elevation; Figure 2 is a horizontal section through the hub, the other parts being shown in ele- Figure 3 is a partial section and partial side elevation of the adjacent ends of the propeller blade spindles and angle varying means; and, 5

Figure 4 is a vertical section taken approximately on the line 4-4 of Figure 3,

y the arrows.

Referring to the drawings, 1 designates a comparatively heavy hub, one side of which is covered by a removable cap 2, the cap 2 being disposed at the outer end of the hub. In its centre the hub 1 is provided with the usual opening 3 adapted to receive theordinary'form of ropeller shaft, and the hub'is further provi ed on one side with a periph-- eral rim 4.

Diametrically disposed on the .hub are thickened portions 5, arranged to receive bearing capsv 6, which are held in position by means of bolts 7, so that bearings 8 are formed on the opposite sides of the hub.

Rockably disposed in the ii tubular blade spindles 9, disposed in align- .ment with each other and arranged so that '9 may be provided with a screw-threaded portion 10 for engagement with common forms of blades .11, or any suitable known means may be used for connecting the outer ends of the spindles with the blades.

Oneof the spindles 9 adjacent its inner end is provided with a screw-threaded portion 12. Disposed over the adjacent end of the spindle 9 is a sleeve 13 provided with an interiorly screw-threaded portion 14: arranged to engage the screw-threaded portion 12 of the spindle 9, which is entered from one side of the hub 1: ,The sleeve-13 is provided with a chamber 15'arranged to receive the spindle 9entered from the op-po site side of the hub and also to receive a screw-threaded nut 16 which is secured on the other spindle 9. The nut 16 is pro 'wal of the chamber 15 of the sleeve 13.

Suitable openings 22 are formed in the outer face of the nut 19 for the introduction of a spanner or similar instrument, so that the nut 19 may be adjusted. By this'construction the spindles 9 may be rocked with relation to each other and the friction thereof is easily taken up by the balls 18 disposed in the race-way 17. Also'any centrifugal force exerted by the blades -11 upon the spindles 9 will be balanced one against the other, the inner ends of the spindles being connected to each other as described instead of being secured to the hub 1.

Diametricall disposed on the rim 4 of the hub 1 are t ickened portions 23 adapted to. receive guide rods 24 formed at their inner ends with stops 25. Coi1edsprings26 are disposed around the guide rods and, are arranged to exert a tension against weights 27 which are slidably disposed on the guide rods 24. Cooperating with each of the weights 27 there is a pair of links 28, having their inner ends bifurcated and pivotally connected to the weights, as at 29, and havin their outer ends likewise connected to sli able collars 30 disposed on the spindles predetermined speed isreached, centrifugal force will throw the weights 27 outward, overcoming the tension of the springs 26 and causing the collars 30, through the medium of the rods 28, to be moved toward the centre of the hub. This movement of the collars causes a. rocking of the spindles 9 in their bearings as the projecting pins 33 ride in the helical grooves 32 to cause such rocking movement. The spindles being rocked, necesarily the angle of incidence of the blades 11 is changed in proportion to the de ee to which the spindles are rocked. In t e operation of the device the centrifugal action of one propeller blade 11 iscounterbalanced by the centrifugal action of the other propeller blade 11, and the construction shown for connecting the free inner ends of the blade spindles, while sufliciently rigid to hold the ends together, is of such a nature as to permit the easy rocking of one spindle with relation to the other.

Having thus fully described the invention, what is claimed as new and is desired to be secured by Letters Patent is:

1. In a propeller, the combination comprising a hub, a pair of spindles carried by the hub having their inner ends juxtaposed. a sleeve secured on one spindle and arranged to receive the other spindle, a securing member on the other spindle, a securin member loosely disposed on the other splndle and secured to the sleeve, and friction-reducing means disposed between the securing members.

2. In a propeller the combination comprising a pair of spindles having their ends disposed adjacent each other, a sleeve secured to one spindle and provided with a recess, a pair of nuts disposed in the recess, one nut being secured to the second spindle and one nut being secured to the sleeve, and,

friction-reducing means disposed between the nuts.

3. In a propeller, the combination of a hub, a pair of spindles carried by said hub for rotation therewith and rockable relatively thereto, cooperating means carried by said spindles for connecting their inner ends together to permit independent rocking thereof, a pair of slidable governing members disposed at right-angles to said spindles, and connecting means between said spindles and governin members, adapted to rock the spindles during sliding movement of the governing members.

In testimony whereof I have signed my name to this specification.

GEORGE LANZIUS. 

